Sewing-machine electric motor.



l?. l?. HUYGK. SEWING MACHINE ELECTRIC MOTOR.

APPLICATION FILED .TUNE 7, 1907. v Y 985,678. www@ Een, im

3 SEEETSSEEET 32 WFTMESSES, l f L T RQ I l u `v air- QW I l f l ERNOISi5. .norcia OE TOLEDO, OHIO, Assieivon To EDWARD H. RHOADES,

I f TRUSTEE. OE TOLEDO, entre.

loaZZ lwhom it may concern;

yUivi,'iiai) sTAilEs 'PATENT OFFICE.

SEWINGMACHINE ELECTRIC MOTOR.

\- Be it known that I, FRANOis P. HUYCK,

acitizenfl ofthe United States, residing at Toledo, in the countyofLucas andl State of f Qhio have'invented certaininew and useful`Improvemei'its in ``SewingMachine Electric Motors and I do declare thefollowingv to be a full, clear, and exact description of theinfventioiusucli as willeiiable others skilled in theart to which itappertains to nia-ke and wuse the same, reference being had to theaccompanying drawings, and to the letters and gures of reference markedthereon,` which form a. part of this specification.

My invention relates to electric motors forA sewing machines, and itsobject is vto furnisli a-.mo'tor whichmay readily conveniently'bedirectly connected wit-li and operatively vmounted upon the shaft-Of anyof the sewing machines commonly in use,

regardless of vthe considerable variations iii ,the diameters of theshafts.

AXfui't-her objectof, my invention is to pro- .vide` a motor, rheostatand brake, assembled as a compact unit, capable of being applied by anyunskilled person to any ysewing machine wit/houtthe use of tools, save ascrewdriver, and of'r being controlled,tliat is, started stopped and runat any desired speed,-by means ofthe treadle of the machine.- y Myinvention lconstruction of motor rheostat and brake of such'compactformthat it shall occupy no =more space than-the ordinary hand-wheel andwhich may thus be employed in connection with .any drop-head sewingmachine and folded withthe machine into its receptaclewithout..necessitating the removal ofr the motor as hasgbeen-necessaiywith sewing machine motors heretofore in use.

A further object 4of my invention is to provide'astopping and' startingand braking devicein which a single movement releases the brake andstarts the motor, and in which -.thereversemovement, by which the brakeis applied andthe current is cut-off, is automatic.- v

I attain these objects by means of the dev vices and arrangement ofparts hereinafter i described and shown,.and illustrated intheaccompanying drawings, in which,-

Figure l is a central vertical sectional eley vationl of my device,mounted inoperative relationto a sewing machine; Fig. 2, a front-Specication of Letters Patent.

is also designed to furnish al Patented Feb. 28, 1911.

Application led.J'iine 7, 1907. Serial No. 377,710.

elevation of the same with pait of the central covering plate brokenaway to show the interior construction and with the cover of thei'heostat hereinafter referred to, removed; Fig. 3, a rear-elevation ofthe same; Fig. 4., aprear-elevation of the controller-pulley hereinafterreferred to, detached; Fig. 5, a side-elevation of the clamping-doghereinafter ieferredto, detached; Fig. G, a sideelevation of theradially adjustable com pressionsleeve hereinafter referred to,detach-ed, showing, in section, the parts illustrated inFigs. 5, 7, and8; Fig. T, an endview ofthe outer member of the compression-sleeve; Fig.S, a side elevation of the detent-ring hereinafter referred tog' Fig. 9,a side elevation of tlie'inner splitv member of the compression-sleeve;Fig. 10, an endelevation of t-hesame seen from the right in IFig. 9 Fig..11, an edge-elevation of `the brush-holder hereinafter referred to;Fig. l2, a side-elevation of the brush-holder stud hereinafter referredto, detached, and Fig. 13, a top-plan' view of the connectionshereinafter referred to, provided for causing the motor to run in eitherdirection.

Like numerals of reference indicate like parts throughout the drawings.

Invthe drawings. l is the projecting end of' 'i a sewing machine shaftfrom which the 'hand-wheel has been removed. Upon this shaft is rigidlyclamped a two-part dog 2 by means of clamping screws 3. This dogternally threaded sleeve the inner end of which abuts against the dog:2, the outerfenfd having a head 6 recessed transversely for the--reception of a wrench. Thesleeve 5 is pi'ovided with a series oflongitudinal slots eX- tending from its outer end nearly to itsV innerend and with a series of corresponding end nearly to its outer end. By'reason of these slots the sleeve at both ends has considera-ble radialresiliency and both ends of the sleeve may be compressed `tov clasp vasvi'oo .alternating slots extending from-its inner closely as may bedesired 'the'sliaft upon which the sleeve is laced. z

' threaded sleeve the T an interna ly threads of which correspond'withthe exten .nal threads on the sleevefiy f lhe spiral ribs y faces arebrought powerfully together. the resilient sleeve 5. is, by thewedge-like acor threads upon the meeting surfaces of the sleeves 5-7 areoppositely beveled in transverse section in such fashion that when. bythe rotation of the inner sleevethe outer sleeve being immovable,-thesebeveled surtion of the inclined planes, compressed and caused topowerfully grip. the shaft.. During the rotation of the inner sleeve itsendtravel is prevented by the head 6 coming in 4 .contact with the outerend of the sleeve 7 the inner end of which sleeve rests against the d og2. The inner end of the sleeve 7 is provided with projecting lugs orfingers 7a which-project into notches 2 in the dog 2.

This dog being securely clamped upon 4the shaft of the machine and thesleeve being thus engaged with the dog, end 'motion of 'I 13 is thearmatureor rotor of the motor Y displacement.

-5 and 7 being secured upon and revoluble the sleeve and the partssupported thereon is prevented and the shaft and the dog must alwaysrotate together. Around the outer surface of the sleeve 7 near its innerend is argroove or ball-race 8 in which is a yseries of anti-frictionballs 9. These travel in an external two-part ball-race composed ofrings 10 secured within the inner diameterof an extension hub 11 of thesupporting frame or housing 12 as shown in Fig. 1, as will behereinafter more fully explained.

'and 14 4is the field-magnet which, together with its poles, embracesthe armature. The hub 15 of the -armature slips loosely upon theexternal surface of the sleeve 7.

16 is a ring which fits upon the projecting extremity of the sleeve 7,the ring and sleeve having corresponding'flattened portions, as at 16a,which compel 'the rotation of both together. Pivoted upon the outer sideof the hub of the rotor and within the 'annulus surrounding the shaft isa pawl 17 the free end of which has a tooth adapted to engage snugly anotch 18 in the edge of the ring 16. The head of the split sleeve 5overlaps and holds the notched ring 16 against The inner and outersleeves with the shaft in the manner above described, the ring. the twosleeves, the dog 2, and the shaft are independent of the rotation of thearmature which loose upon by means of 'clamping screw 23. '.lhe twocurved arms each `"forming a semi-circle. provide accueillait-:receptacle and support f for a rheostat IQl-lwhich is clamped andsecured 1n place-between the arms by means of the clamping screw.

It will be seen that; the housing or frame 12 is supported upon 'theball-bearings 9-10 vand that the frame and its load would. un-

less prevented, tend to revolve upon the shaft of the machine. Toprevent this rotation and to hold the frame 12 and its burdenstationary. notwithstanding the rotation of the armature and the shaftofthe machine, I provide two arms curved as shown, the upper vertical endsof these arms sliding in sockets 26 formed integral with the frame 12.1n the sockets, abutting againstI their upper ends, are compressionsprings 27 which vhold the arms pressed normally downward. At the lowerend of the arms 25 are feetclad, as at 2S, with soft rubber or othersuitable substance and which rest upon the table or frame of the sewingmachine. It will be seen thatthe elastic arms resting upon the table orother part of the sewing-machine-support not only overcome the tendencyof the frame and its load to turn upon the shaft of the sewing machinebut also take the greater part of the weight of the device from theballlbearings.

' lVhen direct .current machines are employed as, by way ofillustration, in the present instance, the lnush-holders 29 are pivotedupon studs 30 secured to the side of the field magnets. The arms 29 areprovided with springs 31 which engage the arm and a stop 30a fastenedupon or integral with the stud 30, which springs hold the free ends ofthe brush-holders normally pressed inwardly toward and in elasticcontact with the commutator. Each of the studs 30 is suitably insulatedand forms a terminal for its appropriate winding in the field magnet.The field magnets 1l are of laminated iron, the lamin being of the formshown in Figs. 2 and 3. The field magnet being, as shown, eliptieal inoutline, there is left at. each side of thel circular armature a spacefor the windings of the field magnet, also an air-space and a recess forthe brakeshoes 33 hereinafter to be described.

' As my motor is designed to be used interchangeably with all sewingmachines and since some sewing machine shafts revolve in a directionopposite to the movement of others, it becomes necessary to provide forthe rotation of my armature in either direction. I accomplish this bymeans of the device illustrated in Fig. 13 in which 3l are the terminalsof the field magnets. 35 the terminals. of the armature, and 36 smallcopr links capable of being reversed as indicated by the dotted linesand thus communicating the current in a reversed direcytion tothebrushes. The blush-holders 29 .are otunequal length and areinterchangeable tin-studs 30 so that `the lead of the r semi-circulararms 22 of the fra-me 19 consists of a hollow spool 37, of porcelain or-other noirconducting subst-ance, about the periphery of which is wounda series of resista1ice-coils y38 connected respectively withcontact-pins 39, the elect-ric resistance decreasing through the seriesof cont-actpins romfright to left or clockwise. (See F ig. Centrally ofthe spool is a stud 40 upon which is journaled a barrel 41'containing a'coiled springf 42 one end of which is connected with the barrel, theother end being connected with the barrel-arbor. Projecting radiallyfrom the barrel 1s a lug 43 y(see Fig. 2) to which is secured rigidlyone end of a curved contact-spring 44, the other `end being adapted toengage successively he resistance contact-pins 39.y When the arrel isrotated on its bearings the free end "of the spring 44 strikes.successivelythe series of pins 39. The spring 42 holds thecontact-spring 44 retracted and normally against idler-pin 39a and outof circuit.

45. is a diskhaving a grooved periphery secured centrally to andrevolving with the barrel 41. This disk forms both a pulley for rotatingthe barrel and a cover for the cavity of the spool 37 and its supportingring 25 25. In the peripheral groove of the pulley 45 is secured one endof a flexible band 46 partly embracing the pulley and which leads and'issecured to and is controlled by the treadle of the sewingmacontact-spring is thus quickly and surely` chine or other suitabledevice for controlling the band 46 and its pulley 45. It will be seenthat when the band 46 is drawn downwardly Aand unwound from the pulley,the pulley is rotated, carrying with it the barrel and thecontact-spring, and that the Y inner side of the field magnet asy Shown.

lThe brake-shoes are faced with leather orr other `suitable material.The metal of the br'ake-shoes 33 is resilient and forms sprin which tendto hold the brake-shoes normal y out of contact with the periphery oft-he armature. The connection between the stirrup andthebrake-rods 49`is through a turnthe first, pin` in the series. and permits thervarmature to revolve freely, and that, re-

versely, when the barrel is moved by its spring 42 into its normalposition, the superior tension of the spring 42 overcomes thebrake-springs and automatically sets the brakes upon the armature,instantly overcoming its momentum and stopping the machine. By means ofthe cooperating variable resistance and brake-mechanism here describedthe movementof the machine may be exactly controlled.

The course of the electric current is through inleading wire 51, throughlink 52 to the terminal of the winding of kone side of the field magnet,(see Fig. 3,) thence to. one of the terminals 34 of the field magnet,thence t the terminal of the appropriate brush through link 36, thencethrough the brush and commutator to the lopposite side of thecommutator, through the opposite brush to the other terminals 35 and34-throughthe remaining link y.36, thence through the lwindings of theoppo site field magnet to its terminal, thence through link l53 to .thecontact-pin, in the rheostat, of lowest resistance in the series of pins39. thence through the selected windings of the rheostat, through thecontactspring 44 andthe arbor 40 through a linkring Wire 54.

55 is a lug formed upon the frame of the motor upon which is pivoted, asat 56, an arm 57 at theouter end of which is journaled, as at 58, afriction-wheel 59. The arm 57 carries a bracket 60 which is curvedaround the friction wheel 59 and the ex.- tremity of-which lies in linewith the axis of said friction-wheel. Between the axis of thefriction-wheel and the extremity of the bracket 60 is interposed. as at61, means for holding a bobbin-spool of the usual or any preferredconstruction. Upon the arm 57, surrounding pivot 5G, is a-boss 62 havingya radial extension which contacts with a spring 63. Pivoted upon theframe ofthe machine, as at G4, is an arm upon the upper end of which isjournaled an idler 66. The friction-wheel 59 and the idler G6 lie in thesame vertical plane. The arm 57 carryingy the wheel 59 with its,associated bobbin-holder may be swung upwardly not shown in thedrawings,-to the ontleend- I llO t divisional application for LettersPatent of ters Patent is,-

4, est,

bringing the wheel 59 against the idler .536 which in turn is forcedagainst the peripheral surface of the eon'nnutator. The spring 63engaging the irreguiar boss 62 holds the arm 57 and its load either inits elevated or depressed position. The armature being in motion withtheidler in contact with the commutator and the bobbin-winder wheel 59 incontact with the idler, the bobbinspool is revolved and may be wound inthe usual manner. During this operation the lpawl 17 may be disengagedfrom the notch 18 in the ring 16 so that now the armature revolves looseupon the sleeve 7 of the sewing machine which stands idle during thebobbin-winding operation.

From the foregoing description of my device the assembling and operationof the same will be understood without further explanation.

Sonie of the features of the devices herein described, are made thesubject of my the United States, for controllers for elec# tric motorsfor sewing machines, filed December 28th, 1907, Serial No. aLOSS.

What I claim and desire to secure by Letl. In a sewing machine electricmotor, a sewing machine shaft. a dog, means' for rigidly securing thedog upon thesha-ft in longitudinally adjusted relation thereto, a sleeveupon the shaft, means for detachably engaging the sleeve and dog, anarmature journaled upon the sleeve, means for detachably engaging thearmature and sleeve in rotative relation, a frame revolubly supportedupon the shaft, a field magnet surrounding the armature and supported bythe frame, andy means for holding the frame against rotation on itsbearings.

2. In a. sewing machine electric motor, a shaft, a sleeve detachablyfixed upon the shaft, an armature upon and adapted to drive the shaft, aframe journaled upon and supported by the sleeve, a field magnet whichembraces the armature and is carried by the frame, and means for holdingthe frame against rotation upon the shaft.

3. In a sewing machine electric motor, an armature adapted to beoperatively engaged with a sewing machine shaft, a frame adapted to berotatively supported upon such shaft, afield magnet surrounding thearmature and supported b v said frame, a rheo stat supported by saidframe, and means for preventing the movement of the frame yon itsliournal, said armature frame field magnet .and rheostat being disposedin substantially the same plane.

al. In a sewing machine electric motor, an armature adapted to beoperatively engaged with a sewing machine shaft. a frame adapted to bejournaled upon such shaft, a field magnet'iembracing the armature Vandsup ported h v the frana. a rheostat supported by the frame, and a brakemechanism for the armature, all of said elements being assembled andsecured in operative relation as an organized machine, and means fordetachably and operatively mounting such organized machine upon theshaft. of a sewing machine.

5. In a. sewing machine electric motor, an armature, a field magnetsurrounding the armature, a brake-shoe interposed between the armatureand field magnet and .tensioned againstfrictional Contact, and means forthrowing the brake-.shoe into frictional engagement with the peripheryof the armature.

G. In a sewing machine electric motor, an armature, a field magnetsurrounding the armature, a pair of brake-shoes at opposite sides of thearmature interposed between the field magnet and the armature and sionedagainst 'contact with the armature,

and means for overcoming such tension andV for holding the shoesnormally in frictional contact with the periphery-of the armature- 7. Ina sewing machine electric motor, a lframe, a field magnet supported bythe fraaie, a shaft on which the frame is revolubly supported, anarmature mounted upon the shaft, a commutator for the armature, a bobbinwinder frame pivoted upon the frame first mentioned, a friction-Wheeljournaled in the bobbin winder frame, an arm pivoted upon the mainframe, an idler journaled at the extremity of said arm and adapted toswing into and out of frictional engagement with the commutator, saidfriction-wheel being adapted to be thrown into and out of engagementwith the idler, the arrangement being such that motion may becommunicated from the commutator through the idler to the friction-Wheelof the bobbin winder.

8. A sewing machine electric motor comprising an armature adapted to besupported upon a sewing machine shaft, a frame adapted to be rotativelysupported upon such shaft, a field Imagnet carried by the frame andsurrounding the armature, a rheostat carried by the frame, a brakemechanism carried by the frame, connections carried by the frame foractuating the rheostat and the brake mechanism in harmony, means carriedby the frame for preventing its rotation on the shaft, a bobbin Windercarried by the frame and adapted to be thrown into and out of frictionalconnection with the armature, and means for det-achably connecting thearmature in rotative relation to such shaft.

9. In a sewing machine electric motor, a frame, a sewing machine shaftupon which ,the frame is'revolubly mounted, a field magnety secured tothe frame, an armature mounted upon the shaft within the field lbeingmagnet,l coils upon the field magnet, coils upon the armature, pairs ofterminals for thefrespective coils Adisposed adjacent to each other,vand means for det-achably connecting either member of one pair withelther member of the other pair whereby the current through the armaturemay be caused to flow in either direction and where? shaft, a framejournaled upon such sha ft, a eld-magnet surrounding the armature andsupported' by said frame, a rheostat supported by said frame, and`vmeans for holding the frame from turning upon its bearings.

11. In a sewing-machineelectricl motor, an armature, a frame, afield-magnet, a rheostat, and a brake-mechanism, all of said elementsassembled and secured in operative relation as a unitary structure, andmeans for detachably engaging such structure with the shaft of asewing-machine,v comprising a dog adaJ ted for rigid engagement with theshaft, an means for operatively connecting the armature with said dog.

12. In a sewing-machine electric motor, an

armature, a' frame, a field-magnet, a rheostat, j

and a brake-mechanism, all of said elements bein assembled and 'securedin operative relation as a unitary structure, means for detachablyengaging su'clr structure with the shaft of a sewing-machine, comprisinga dog adapted for rigid engagement with the shaft, means for operativelyconnecting the armature wit-h said dog, and means for holding the frameagainst rotation upon such shaft.

13. In an electric motor, the combination with a commutator, of a wheelfrictionally contacting with said commutator,l and mechanism driventhereby. y

14. In an electric motor, the combination with a commutator, of a wheeladjustable *rotor` and stator' thereof and engaging the surface oftherotor.

-16.y The combination. with an electric motor, a rotor, an annularstator surrounding said rotor, a segmental. bralte shoeintermediate'said rotor and stator and in the space between the poles ofthe stator, one end of said shoe being anchored to the stator poles andan operating connection for said shoe extending tangentially therefromthrough a recess in said stator.

17. An electric motor comprising a hollow spindle, a rotor and ay statormounted thereon and in the same plane, and an annular member secured tosaid rotor projecting beyond thc end of said hollow spindle.

1 8. An electric motor comprising a eld magnet and an armature arrangedin the same plane, one within the other. the one constituting the statorand the other the rotor, a hollow spindle for detachably mounting uponthe shaft to be driven arranged concentrically within said field andarmature, mountings for said rotor and stator journaled upon said hollowspindle adjacent to each other and wit-hin the space inclosed by theinner member, radial extensions from one of said mountings at oneside ofsaid inner member for supporting the outer member and a clutch locatedin the space within the inner meinberfor coupling the rotor to saidhollow' spindle.

19. An electric motor comprising a frame having two eccentric annularportions, a rotor journaled within one of said annular portions ofthefra-me,`a statorinounted on said frame concentric with said rotor andcontrolling mechanism for said motor mounted within the other annularportion of said frame.

Q0. The combinationwith an electric motor and a control mechanismtherefor organized as an operative unit, said control mechanismcomprising a rheostat, a controlling switch therefor, and a'mechanicalbrake for the rotor of said motor, said control mechanism vand motorbeing arranged in the same plane, and means for mounting said unit uponthe shaft to be driven.

21. The combinationwith an electric motor comprising a rotor and astator, of an adjustable bushing for attaching said motor to the memberto be driven thereby, said bushing being adjusted by a rotation thereofin relation' to the rotor of said motor and means for locking said rotorto said stator during saidadjustment.

' -In testimony whereof I alix my signature in presence of twowitnesses.

FRANCIS P. HUYCK.

Witnesses: i

L. A. ALEXANDER, H. HAUDENSGHILD.

